WASHINGTON — The United States has undertaken the lion’s share of coalition military sorties against Libya late Saturday and Sunday, despite NATO formally taking command of operations, Pentagon figures showed.

Of 167 sorties flown between 1930 GMT Saturday and 1500 GMT Sunday, more than half — some 97 — used US aircraft, the US Defense Department said.

That figure is only slightly less than the 62 percent of sorties flown by the US planes since Operation Odyssey Dawn got underway on March 19.

The latest Pentagon figures showed some 1,424 missions conducted during the operation so far as it imposes a United Nations Security Council-mandated no-fly zone over Libya.